Investigations are directed by the history, and include:
- urea and electrolyte measurement are indicated if there has been prolonged vomiting, or if surgery is being considered
- plain abdominal radiology, which will reveal loops of distended bowel, double bubbles or intraluminal gas.
- ultrasound scan may help in the diagnosis of pyloric stenosis or abscesses, but is operator dependent
- barium enema may be used in meconium ileum or Hirschsprung's disease
Last reviewed 01/2018